Feat: support cue printer & add support for protocol https

[Somefive]

1. External provider use $params as input and $returns as output.
2. Support https protocol for external provider. By default, it will use insecure-skip-verify.
3. Split cue printer into separate functions.
4. Update CI bootstrap to allow absolute crd path.
5. External provider will inject "#do" value to http request header "CueX-External-Provider-Function".

[codecov]

Codecov Report

Base: 90.06% // Head: 90.14% // Increases project coverage by +0.08% 🎉

Coverage data is based on head (aebb253) compared to base (1ab9b99).
Patch coverage: 93.22% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #55      +/-   ##
==========================================
+ Coverage   90.06%   90.14%   +0.08%     
==========================================
  Files          58       59       +1     
  Lines        1952     1989      +37     
==========================================
+ Hits         1758     1793      +35     
- Misses        142      143       +1     
- Partials       52       53       +1     

Flag	Coverage Δ
unit-test	90.14% <93.22%> (+0.08%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
cue/util/printer.go	90.32% <90.32%> (ø)
cue/server/server.go	90.00% <90.90%> (+1.11%)	⬆️
cue/cuex/compiler.go	83.05% <100.00%> (+0.14%)	⬆️
cue/cuex/runtime/package.go	79.54% <100.00%> (+0.97%)	⬆️
cue/cuex/runtime/provider.go	88.67% <100.00%> (+2.01%)	⬆️

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